JPH0342496A - Operating structure for baggage support section of weight lifting device - Google Patents

Abstract

PURPOSE:To perform the lifting/lowering action of a support section while both hands are put on a baggage by bringing an operator's hand into contact with the displacement detecting body of a controller circuit commanding the lifting/lowering or horizontal movement of the baggage support section. CONSTITUTION:When a support section 1 grips a baggage and an operator puts a hand on a switch body 2, a lift command circuit is operated, and its signal is transmitted from a transmitting section 4a to a receiving section 8a. The receiving section 8a receives the lift command, and a motor 7 is positively rotated by the positive rotating circuit of the control circuit of the motor 7. When the motor 7 is positively rotated, a rope 5 is wound by a winding mechanism 6 on its winding barrel, and the baggage support section 1 is lifted. When the operator releases the hand from the switch body 2, the lift command is stopped, and the baggage support section 1 is stopped at the lifted position. When the operator puts the hand on the switch body 3 of the baggage support section 1, a lowering command circuit is operated, the motor 7 is reversely rotated, and the baggage support section 1 is lowered.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention can realize a new operation mode for a load support part in a relatively small-sized lifting device such as a crane, balancer, chain block, or hoist. It is about the structure that can be created.

The load support part to which the present invention is applied is a hook.

Refers to anything that is attached to a lifting device, such as a gripper or a suction cup, and has a structure for lifting the load.

[Conventional technology]

The cargo support section of a relatively small lifting device such as a small crane is composed of appropriate means such as hooks and gripping devices. This is generally done by operating an operation button or the like provided on a pendant-type operation box or the like. Even in large-scale lifting devices, in most cases, a load support section and an operation section for raising, lowering, or traveling the support section are disposed separately.

[Problem to be solved by the invention]

Therefore, in order to raise and lower the load supporting part in a conventional cargo lifting device, an operating part must be provided separately even if it is provided in close proximity to the load supporting part. Therefore, the operator cannot operate the operating section while supporting the load with both hands.

In particular, when lifting or lowering a suspended load, the load may swing or rotate, resulting in a lack of safety in handling the load, or if the load is being lifted or lowered by an operator other than the operator. It often lacks labor-saving features, such as requiring assistance personnel to stop the rotation.

In view of the above-mentioned current situation in the handling of cargo using a hoisting device, the present invention has been developed to enable the operator to operate operations such as raising and lowering the support section of the cargo even when the operator has both hands on the support section of the cargo. The object of the present invention is to provide an operation structure for a cargo support portion of a lifting device.

[Means to solve the problem]

The structure of the present invention, which has been made to solve the above problems, is such that, in a load supporting portion of a lifting device such as a crane or a hoist,
A displacement detector that generates displacement when touched by a person's hand and detects this displacement using an electric signal or the like is attached to a part that does not come into contact with the load, and this displacement detector is used to issue commands for raising and lowering the load supporting section. It is characterized by being inserted as a switch for operating the control section.

[For production]

The cargo support section is provided with a displacement detection body that is inserted into the control circuit that outputs commands for lifting and lowering the support section, for example, as a switch body for turning on and off the control circuit. When the load is supported by the load supporting portion, the support portion can be raised or lowered by holding the load with both hands and touching a switch provided for raising or lowering the load so as to make it conductive. In other words, the user can raise and lower the support part with both hands on the load supported by the support part.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an example of the operating structure of the luggage support section of the present invention, and FIG. 2 is a circuit diagram of the example.

In these figures, reference numeral 1 denotes a cargo support portion of a lifting device, which is formed into an example of a gripping device by incorporating constituent link members 1a and lb in a scissor shape. Although the gripping force transmission mechanism is not shown, any structure of the gripping force transmission mechanism may be used. Therefore, in the present invention, the load supporting portion l
The structure is not limited to the grasping device shown in the example in the figure, but includes grasping devices of other structures, as well as hanging devices, suction devices, hooks, and anything used as a load support part of a hoisting device. .

2.3 is the link members 1a and lb of the support part 1, when a load (not shown) is supported on the support part 1,
For example, a link member 1a that does not come into contact with the luggage.
This is a switch body formed by a bar-shaped piezoelectric type displacement detecting body attached to the outer surface of horizontal members 1c and ld in lb.

Although piezoelectric type non-contact switch bodies are used here as the switch bodies 2 and 3, it is optional to use a contact type switch body. In either case, bar-type links that can be disposed along the longitudinal direction of the link members 1c and ld are desirable.

When using a piezoelectric type displacement detector for the switch body,
Since the electromotive force varies depending on the pressure applied by a person's hand to this switch body, the output of this switch body can be used as a signal for speed control.

Further, the switch body 2 is inserted into the ascending side of a control circuit 8, which will be described later, and the switch body 3 is inserted into the descending side of the control circuit 8, respectively.

Reference numeral 4 denotes a motor operation command transmitting section in which the switch bodies 2 and 3 are inserted into the control circuit 8 thereof, and is equipped with a power source, a control circuit 9 transmitting section, etc., and is a link member 1a.

It is attached at an appropriate location on the lb.

Reference numeral 5 indicates a rope made of a chain, belt, etc., on which the load support section is attached in a suspended state, and 6 indicates a winding 2 of the rope 5.
A winding mechanism 7 for rewinding is a motor serving as a driving source for the winding mechanism 6, and has at least the function of forward and reverse rotation and locking of the rotation.

Reference numeral 8 denotes a control circuit for the motor 7 provided on the side of the main body of the hoisting device, which supplies drive control signals to the motor 7 for controlling forward rotation, reverse rotation, locking of this rotation, etc. of the motor 7.

In this embodiment, the control circuit 8 is operated by a wireless signal or an optical signal generated in the command signal transmitting section 4 being supplied from the transmitting section 4a to the receiving section 8a of the control circuit 8. is formed.

The method of supplying the command signal to the control circuit 8 may be either wired or wireless, and in the case of a wireless method, the carrier medium of the command signal may be light waves, sound waves, etc. .

The elevating mechanism of the above-mentioned hoisting device depends on the structure of the hoisting device itself, for example, crane type or hoist type.

Although there are differences in the details of the mechanisms, there is no difference in the manner in which the cargo support section 1 moves up and down, so the cargo support section of the present invention can be applied to any type of lifting device.

An example of the operation structure for the load support part of the present invention formed as described above is used in the following manner.

The operator of the hoisting device causes the load supporting section 1 to support the load to be carried. In the example shown in FIG. 6, the operator causes the load supporter 1 to grasp the load.

The baggage gripping mechanism may be powered by an actuator or gripping force using the weight of the baggage.

Although there are some that utilize the clamping force of a spring or the like, the difference in the gripping mechanism does not pose any problem in the present invention.

When the operator touches the switch body 2 while holding the load on the support part 1, the lift command circuit into which the switch body 2 is inserted is activated, and a signal to that effect is sent from the transmitting part 4a to the receiving part 8a. Supplied.

Upon receiving the ascending command, the receiving section 8a operates a normal rotation circuit in the control circuit of the motor 7 (in this example, the normal rotation of the motor is on the ascending side) to rotate the motor 7 in the normal direction. Due to the forward rotation of the motor, the hoisting mechanism 6 winds up the cable 5 on its winding drum, so that the load support part 1 rises.

When the operator releases his hand from the switch body 2, the supply of the lift command is stopped, so that the cargo support part 1 remains stationary at the lift position.

If the operator touches the switch body 3 of the cargo support part l in this state, the lowering command circuit into which this switch body 3 is inserted is activated, and a signal to that effect is sent from the transmitting part 4a to the receiving part 8a.
The motor 7 rotates in reverse to move the rope from the hoisting mechanism 6 to the rope body 5.
As the load is rewound (unrolled), the load support section 1 descends.

In the above embodiment, the switch bodies 2 and 3 are piezoelectric types,
If the output characteristic is proportional to the applied pressure, this output characteristic is used as a signal for controlling the speed of the motor. In addition, a hoisting mechanism 6 is provided in other parts of the baggage support section 1.
If a switch body for the command circuit for the motor of the mechanism for moving the motor 7 in a horizontal plane is provided, the cargo support l
In addition to lifting and lowering the cargo support section 1, the support section 1 can also be moved in the horizontal direction.

Note that horizontal movement includes not only displacement within a plane but also turning on the spot.

〔Effect of the invention〕

As explained above, one aspect of the present invention is to provide a displacement detector as a switch body inserted into a circuit of a control unit for instructing the lifting/lowering and horizontal movement of the supporter in the cargo supporter of a hoisting device. By touching the displacement detector with the operator's hand, the load supporting section can be moved in a desired direction, so the operator of the lifting device can keep both hands on the load supported by the load supporting section. The lifting device can be operated at
In addition to improving overall efficiency, operators can handle cargo in a labor-saving manner.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the operating structure of the luggage support section of the present invention, and FIG. 2 is a circuit diagram of the example.

Claims (1)

[Scope of Claims] 1. Displacement detection in which displacement occurs when a human hand touches a part of a load supporting part of a hoisting device such as a crane or hoist that does not come in contact with the load, and this displacement is detected by electrical signals, etc. 1. An operating structure for a cargo support part of a hoisting device, characterized in that a displacement detecting body is inserted as a switch for operating an operation command control part for raising and lowering the cargo support part. 2. The output of the displacement detector provided on the cargo support section is supplied to a control circuit for commanding the moving direction, moving speed, positioning, etc. of the cargo support section. Operation structure for the load support part of the hoisting device.